Ответ:
I am a pupil.
My father is not a teacher, he is a scientist.
Is your aunt a doctor?
Yes, she is.
Are they at home? No, they are not at home, they are at work.
My brother is a worker, he is at work. Are you an engineer? Yes, I am.
Объяснение:
I am
He is
She is
It is
You are
We are
They are
Формы глагола to be зависят от местоимений.